ath9k: Update QCA956x initvals

HW peak detect calibration would fail for AR9300 chips and
we went for implementing the SW way of doing it instead of
HW doing the peak detect calibration.

Signed-off-by: Miaoqing Pan <miaoqing@codeaurora.org>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

ath9k: Add initvals for QCA956x

Signed-off-by: Miaoqing Pan <miaoqing@qca.qualcomm.com>
Signed-off-by: Sujith Manoharan <c_manoha@qca.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>